Traveling Plague, Umbral Collar Zealot, and Gremlin Tamer

Prerequisites

• Traveling Plague in hand
• Umbral Collar Zealot on the battlefield
• Gremlin Tamer on the battlefield
• available

Steps

1. Cast Traveling Plague by paying , attaching it to another creature you control
2. When Traveling Plague enters, Gremlin Tamer triggers, creating a creature token
3. Activate Umbral Collar Zealot by sacrificing the creature Traveling Plague is attached to
4. When the creature dies, Traveling Plague triggers, returning itself from your graveyard to the battlefield attached to the token created in step 2
5. When Traveling Plague enters, Gremlin Tamer triggers, creating a creature token
6. Resolve the Umbral Collar Zealot ability
7. Repeat from step 3

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite surveil 1